<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace core\http;

use core\http\Response;

/**
 * RedirectResponse represents an HTTP response doing a redirect.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
use core;

class RedirectResponse extends Response {
	/**
	 * Creates a redirect response so that it conforms to the rules defined for a redirect status code.
	 *
	 * @param string  $url    The URL to redirect to
	 * @param integer $status The status code (302 by default)
	 *
	 * @see http://tools.ietf.org/html/rfc2616#section-10.3.5
	 */
	public function __construct($url, $status = 302) {
		if( empty( $url ) ) {
			throw new \InvalidArgumentException( 'Cannot redirect to an empty URL.' );
		}
		
		parent::__construct( sprintf( '<html><head><meta http-equiv="refresh" content="1;url=%s"/></head></html>', htmlspecialchars( $url, ENT_QUOTES ) ), $status, array( 'Location' => $url ) );
		
		if( !$this->isRedirect() ) {
			throw new \InvalidArgumentException( sprintf( 'The HTTP status code is not a redirect ("%s" given).', $status ) );
		}
	}
}
